package cn.itcast.netty.netty.c3;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.Channel;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.codec.string.StringEncoder;
import io.netty.handler.logging.LogLevel;
import io.netty.handler.logging.LoggingHandler;
import lombok.extern.slf4j.Slf4j;

import java.net.InetSocketAddress;
import java.util.Scanner;

/**
 * className: CloseFutureClient
 * description:
 * date: 2024/6/8-8:48
 * <p>
 * project: netty-demo
 * package: cn.itcast.netty.netty.c3
 * email: 1085844536@qq.com
 * version:
 *
 * @author WangGuojian
 */
@Slf4j
public class CloseFutureClient {

    public static void main(String[] args) throws InterruptedException {
        NioEventLoopGroup group = new NioEventLoopGroup();
        ChannelFuture channelFuture = new Bootstrap()
                .group(group)
                .channel(NioSocketChannel.class)
                .handler(new ChannelInitializer<NioSocketChannel>() {
                    @Override // 在链接建立后调用
                    protected void initChannel(NioSocketChannel ch) {
                        ch.pipeline().addLast(new LoggingHandler(LogLevel.DEBUG));
                        ch.pipeline().addLast(new StringEncoder());
                    }
                })
                .connect(new InetSocketAddress("localhost", 8080));
        Channel channel = channelFuture.sync().channel();
        log.debug("{}", channel);
        new Thread(() -> {
            Scanner scanner = new Scanner(System.in);
            while (true) {
                String line = scanner.next();
                if ("q".equals(line)) {
                    channel.close(); // close 异步操作 1s 之后
                    // log.debug("处理关闭之后的操作"); // 不能在这里善后
                    break;
                }
                channel.writeAndFlush(line);
            }
        }, "input").start();
        // 获取 ClosedFuture 对象， 1) 同步处理关闭 2)异步处理关闭
        ChannelFuture closeFuture = channel.closeFuture();
        // System.out.println("waiting close...");
        // closeFuture.sync();
        // log.debug("处理关闭之后的操作");
        closeFuture.addListener(future -> {
            log.debug("处理关闭之后的操作");
            group.shutdownGracefully();
        });
    }

}
